U3=I3*R3=0.2*4=0.8B = U1=U2= V, I1= U1/R1=0.8/1= 0.8A, I2=U2/R2= 0.8/2=0.4A, Iобщ=I1+I2+I3=1.4A =A -показания амперметра, Rобщ= V/Iобщ=0.8/1.4=≈0.57 Ом
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U3=I3*R3=0.2*4=0.8B = U1=U2= V, I1= U1/R1=0.8/1= 0.8A, I2=U2/R2= 0.8/2=0.4A, Iобщ=I1+I2+I3=1.4A =A -показания амперметра, Rобщ= V/Iобщ=0.8/1.4=≈0.57 Ом